| Model Year | 2007 | 2011 | |
| Model | Audi A8 / S8 | Mercedes-Benz R-Class | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan, ext. | 4dr SUV | |
| Difference | |||
| Wheelbase | 121.0 in | 126.6 in | -5.6 in |
| Length | 204.4 in | 203.0 in | 1.4 in |
| Width | 74.6 in | 77.1 in | -2.5 in |
| Height | 57.3 in | 65.4 in | -8.1 in |
| Curb Weight | 4399 lb. | 4949 lb. | -550 lb. |
| Fuel Capacity | 23.8 gal. | 21.1 gal. | 2.7 gal. |
| Headroom, Row 1 | 37.4 in | 39.8 in | -2.4 in |
| Shoulder Room, Row 1 | 59.1 in | 60.3 in | -1.2 in |
| Legroom, Row 1 | 41.3 in | 39.8 in | 1.5 in |
| Headroom, Row 2 | 38.3 in | 40.4 in | -2.1 in |
| Shoulder Room, Row 2 | 57.5 in | 59.6 in | -2.1 in |
| Legroom, Row 2 | 42.3 in | 36.2 in | 6.1 in |
| Headroom, Row 3 | 0.0 in | 37.2 in | -37.2 in |
| Shoulder Room, Row 3 | 0.0 in | 52.8 in | -52.8 in |
| Legroom, Row 3 | 0.0 in | 32.4 in | -32.4 in |
| Total Legroom | 83.6 in (over 2 rows) | 108.4 in (over 3 rows) | -24.8 in |
| Cargo Volume, Minimum | 14.6 ft3 | 15.2 ft3 | -0.6 ft3 |
| Cargo Volume, Behind R2 | 14.6 | 42.2 ft3 | -27.6 |
| Cargo Volume, Maximum | 14.6 ft3 | 85.0 ft3 | -70.4 ft3 |
None of our members have yet commented on the seat room and comfort of the 2007 Audi A8 / S8.
None of our members have yet commented on the seat room and comfort of the 2011 Mercedes-Benz R-Class.